Damper control



F. c. AKERS DAMPER CONTROL Jan. 23, 1940.

Filed May 4, 1938 [2714927202 f/a z/oCAkcrs fliiorneys Patented Jan. 23, 1940' DAMPER CONTROL 7 Floyd Akers, Anderson, Ind, Application May 4, weasel-ml No; 205,952

. 2 Claims. cl. 236-49) invention relates to means for automatically controlling flow of air for heating or cooling purposes in response totemperature changes in the room into which or from which the air is being discharged, A primary object of the invention is to provide in one unit an extremely simple devicewhich will be truly responsive toroom temperature variations without being influencedyby proximity of the controlling mechanism to the current of air employed to effect changes in the room condition.

These' and other objects and advantages of the invention will become apparent to those versed in the art in the following description of one simple form which is'illustrated more or less diagrammatically in the'accompanying drawing, in which I Fig. 1 is a front elevation of a structure embodying the inventiony Fig. 2, a vertical section on the'line 2-2 in Fig. 1, and

Fig. 3, adetail in section of the thermostat ele- 'ment connections-with the shiftable control member on theline 3-3 in Fig. 2.

Like characters of reference indicate like parts throughout the several views in the drawing. While the invention may be applied and adapted to a wide range of control units, the unit will essentially include an opening through which a current of air will pass; a shutterarrangement at that opening to control-the eifective area of the opening by reducing or increasing the actual area I thereof; and a temperature responsive element mounted in the unit but in an insulated part thereof so as to be removed from any effect of I the temperature of the-air passing through said opening, and, furthermore, being-so carried by the, unit as to be exposed to the temperature of the room to which the unit is applied.

' In the particular form herein shown, a housing It receives air from the rear side through a com duit or pipe II.

' shown as three in number, are rockably mounted 46 in spaced apart, parallel relationship to be carried by the housing H1 in such manner that when these vanes are rocked to have. one overlap o1 contact the other, the front opening in-the hous. ing in is thereby eifectively closed so that there 50- may be no inter-flow of air between the front side of the housing and thepipe ll. Of course,

rocking the vanes to have their faces in. parallel relation, will provide a substantially clear opening,

55 These vanes I2 areinter-connected so that A'plurality of vanes l2, herein' when one is rocked, the others will rock in unison and in like manner through corresponding ,de-

grees of travel. In the form herein shown, these various blades are inter-connected by their rear edges bymeans of the inter-connecting links l3 5 pivotally inter-connecting with the vanes by their ends. g

The housing I0 is provided with a compartment I4 as an extension of the housing on one side thereof and this compartment l4 while opening 10 from the front side in the present instance is insulated in respect to heat transmission from the housing proper or at least'from that portionof the housing which would be affected by temperature of the air flowing through the housing 15 I0 intoor out of the pipe I I. This compartment 14' is preferably provided, as indicated, to beentirely out of any permissible path of, air, the current of whichmay be. induced by the direct flow vof air through the housing in; 20

In this compartment I4 I mount any suitable thermostat member, a coiled; bimetallic member l5 in the present form.- 'I'heinner end of the coil in this member I5 is secured to a post "5,. Fig. 3, through which extends the axle ll of one 25 of the vanes l2, here shown as being the central vane.

The post 16 is fixed to the partition wall l8 and coils therearound to have its outer end engage apin l9 connecting with a lever 20 fixed on the outer end of the axle ll- Thus upon 30 tempe'r'ature change affecting the member 15 this member will tend to wind up or unwind, as the 'case'may be, and thereby, through the lever 20,

turn the axle l'l so as to shift the'vanes l2 in accordance with the temperature change within 35 I the compartment l4.

r The entire housing I!) with its side compartment I4 may, of course, have a' protective grille over its forward side to prevent tampering with the moving parts, this grille being indicated by 40 the numeral 2|.

While I have herein shown and described my: invention in the one particular form, it is obvious that structural changes may be employed such as in the actual mounting and control of movement of the vanes, the particular form of thermostat employed, and the like, all without departing from the spirit of the invention, and I, therefore, do not desire, to be limited to that V precise form beyond the limitations as may be imposed by the following claims.

I claim: I t 1. In a housing to control air flow-to and from .a'room, a damper means in the housing comprising a plurality of vanes, a rock shafton which one of the vanes is mounted, links connecting all of the vanes together, a chamber in the housing insulated therefrom but opening into the room into which chamber the rock shaft extends, an arm on the shaft within the chamber and. a thermostat actuating the arm to rock the shaft.

2. In a housing to control air flows to and from a room, damper means in the housing comprising a plurality of vanes, a rock shaft on which one of the vanesis mounted and links connecting all of the vanes together, a chamber in the housing insulated therefrom but opening into the room, a hollow post attached to'the wall that separates the chamber from the housing and extending into the chamber, through which the rock shaft passes, and having an air tight bearing, an arm on the shaft carrying a pin, and a bimetallic spiral thermostat having one end attached to the post and the other end attached to the pin.

FLOYD C. AKERS. 

